High fliers Manly and Sydney City both showed worrying second-half lapses despite recording big wins in yesterday's 10th round of the Australian Rugby League premiership. The Sea Eagles charged to a 22-0 half-time lead against Canberra and had the Brookvale crowd cheering for more. But Manly failed to go on with the job and had to be content with a 28-12 final scoreline as the Raiders saved some pride without ever threatening to upset the Manly party. Second-rower Daniel Gartner stood out for Manly, bagging two tries. Ever-green veteran five-eighth Cliff Lyons was also in top form, causing the Canberra defence no end of trouble with his selective passing. But Manly prop David Gillespie was placed on report for a high tackle and could find himself before the judiciary tomorrow night. Unbeaten premiership leaders Sydney City also had their problems against the last-placed North Queensland. The Roosters put on an early scoring rampage, leading 16-0 after just 11 minutes. By half-time, it was 32-4 and a host of records looked set to be broken. But the Cowboys turned things around and actually won the second half by 10-6 as the Roosters limped to a 38-14 win. Five-eighth Andrew Walker had a top game for the Roosters and was one of the few players who still had his mind on the job in the second half. Half-back brothers Ian and Andrew Dunemann, playing together for the first time, combined well for the Cowboys. In the only other game of the second half of the split round yesterday, Newcastle consolidated their spot in the top eight with a 22-6 win over South Queensland. Full-back Robbie O'Davis was the star for the Knights, scoring a fine try and making several impressive runs. Veteran centre Andrew Ettingshausen led Cronulla to a 28-24 win over Auckland on Saturday night. ET scored two first half tries as the Sharks scored one of their best victories of the year. The Sharks led 12-0 after 10 minutes but were pushed all the way by the unpredictable Warriors. After 10 rounds, the Roosters head the ladder on 20 points, followed by Manly (18) and Brisbane (16).